{"id":48456,"date":"2023-02-09T08:00:28","date_gmt":"2023-02-08T23:00:28","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/?p=48456"},"modified":"2026-05-17T14:51:28","modified_gmt":"2026-05-17T05:51:28","slug":"ground-anchor-set-loss","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/groundanchor-setloss\/","title":{"rendered":"Considering Set Loss in Ground Anchor Construction"},"content":{"rendered":"

Hello, everyone.<\/p>\n

This is Enta.<\/p>\n

I just got back from Kagoshima the other day, and today a junior colleague from Kagoshima came to Nagoya and stopped by our office lol<\/p>\n

He\u2019s a junior from the Kagoshima Jitsugyo High School swim team who now works for a major construction company specializing in slope stabilization and foundation work\u2014and he\u2019s the branch manager in Kagoshima!<\/p>\n

I just can't hold a candle to them anymore, lol.<\/p>\n

It really makes me happy when a junior comes all the way from far away, doesn't it?<\/p>\n

I really appreciate it ^^<\/p>\n

\n

But that's beside the point.<\/p>\n

I believe there is an illustration like this on page 79 of the Design and Construction Standards for Ground Anchors.<\/p>\n

\"\"<\/p>\n

Only the right side is shown here; I\u2019ve written down the amount for the left side.<\/p>\n

Tension with the Jack
\n\u2193
\nInsert a wedge into the anchor head
\n\u2193
\nUnload the jack
\n\u2193
\nThe wedge sinks in(Set loss)<\/span>
\n\u2193
\nThe amount of indentation is less than the specified load
\n\u2193
\nThe steel wire loosens due to relaxation
\n\u2193
\nFalls below the specified load
\n\u2193
\nThere's a risk of a landslide (exaggerated)<\/strong><\/span><\/center>
<\/center>This refers to a situation where, due to set loss during the curing process, the load-bearing capacity during the service life is lower than expected.<\/strong><\/span><\/p>\n

To prevent that, tension is applied from the start, taking into account steel wire relaxation and set loss.<\/strong><\/span><\/span><\/p>\n

 <\/p>\n

I've always thought that it's better not to factor in set loss.<\/p>\n

The reason is that I think it\u2019s better to be about 80% nervous rather than 100%.<\/p>\n

It means, \"Under no circumstances should you move it when the load is at 100%!\"<\/p>\n

However, this is because if the device is moved by a temporary earthquake, there is a 100% chance\u2014or rather, a 110% chance\u2014that it will become slightly over-tensioned.<\/p>\n

 <\/p>\n

When I think about it, I wonder if the right approach might be to keep it at around 80% and save some for a rainy day.<\/p>\n

 <\/p>\n

See you later.<\/p>\n

 <\/p>\n

*The format for the set loss report is available for download on the Shioda Development Co., Ltd. website.<\/p>","protected":false},"excerpt":{"rendered":"

Hello, everyone. This is Enta. I just got back from Kagoshima the other day, and today a junior from Kagoshima came to Nagoya and stopped by the office lol. He\u2019s a junior from the Kagoshima Jitsugyo High School swim team, and now works for a major construction company specializing in slope stabilization and foundation work\u2014he\u2019s the branch manager in Kagoshima! My head is already\u2026<\/p>","protected":false},"author":2,"featured_media":5290,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[28],"tags":[48,966,2075,2306],"class_list":["post-48456","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ground-anchor","tag-48","tag-966","tag-2075","tag-2306"],"acf":[],"yoast_head":"\n\u30b0\u30e9\u30a6\u30f3\u30c9\u30a2\u30f3\u30ab\u30fc\u5de5\u306b\u7f6e\u3044\u3066\u30bb\u30c3\u30c8\u30ed\u30b9\u3092\u8003\u3048\u308b - \u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e<\/title>\n<meta name=\"description\" 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